CN109798283A - One kind remotely controlling more relay protective scheme function central pumping stations - Google Patents
One kind remotely controlling more relay protective scheme function central pumping stations Download PDFInfo
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- CN109798283A CN109798283A CN201910052242.8A CN201910052242A CN109798283A CN 109798283 A CN109798283 A CN 109798283A CN 201910052242 A CN201910052242 A CN 201910052242A CN 109798283 A CN109798283 A CN 109798283A
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Abstract
The present invention provides one kind remotely to control more relay protective scheme function central pumping stations; including pumping plant, control system and monitoring system; the pumping plant includes main website and several substations, and the main website is equipped with circulating cooling system and detection system, and the circulating cooling system is used to cool down the oil temperature of main website fuel tank；Several substations in parallel in the main website, the main website is equipped with detection system, for detecting pump station pressure and temperature；The control system judges whether to issue alarm signal according to pump station pressure and temperature, controls pumping plant and work, the monitoring system is used to monitor in real time the state of pumping plant.The invention reside in the remote controls realized to pumping plant; pumping plant can control a certain number of hydraulic pump start and stop according to the pressure demand of hydraulic test equipment; and realize a variety of logic controls and fault diagnosis and protection; safety, the energy-efficient and protection hydraulic test equipment stable operation for improving hydraulic central pumping station, realize the intelligence and networking of central pumping station.
Description
Technical field
The present invention relates to hydraulic power unit technical fields, in particular to a kind of remotely to control more relay protective scheme functions concentration pumps
It stands.
Background technique
Concentrating hydraulic power unit is one of the important equipment of certain Large Hydraulic Systems, is mainly embodied as all hydraulic units
Power oil sources is provided, is the important component of hydraulic automated system.Concentrating hydraulic power unit to consume, power is big, operating condition is multiple
It is miscellaneous, it is necessary to carry out real-time monitoring and control.In the concentration hydraulic power unit of traditional mode, manipulation and monitoring process it is very cumbersome,
Large labor intensity, artificial caused failure and mistake are more, system auxiliary and time are long, the degree of automation is lower.
For large-scale concentration hydraulic power unit control system, should generally support through remote mobile terminal to its operational process
Adjusting is monitored, controlled and is managed, it can be according to the mode master of configuration determination when system jam or operating status change
It is dynamic to send event information, state to specified remote mobile terminal.Hydraulic cooling circuit is big with power consumption simultaneously, continues working
Time is long, and range of temperature requires the features such as more stringent, is easy to exceed defined temperature model if design of Cooling System is bad
Enclosing leads to shutdown, influence system and the normal work with oily device.
However, the research in the concentration hydraulic power unit field is not perfect at present, Chinese patent proposes a kind of intelligent oil
Rouge centralized lubrication pumping plant limits the excellent performance of grease, can not achieve simultaneously although the shortcomings that overcoming hand lubrication
Automatic detection and remote real time monitoring；Chinese patent proposes a kind of pump station integrated control system of coal mining combine work surface for coal, though
Production efficiency so is improved, realizes real time monitoring, but system lacks more relay protective scheme controls, there are security risks.
Summary of the invention
For the deficiencies in the prior art, more relay protective scheme functions are remotely controlled the present invention provides one kind and concentrate pump
It stands, it is therefore intended that realize that the remote control to pumping plant, pumping plant can control centainly according to the pressure demand of hydraulic test equipment
The hydraulic pump start and stop of quantity, and realize a variety of logic controls and fault diagnosis and protection, improve the safety of hydraulic central pumping station
Property, it is energy-efficient and protection the stable operation of hydraulic test equipment, realize the intelligence and networking of central pumping station.
The present invention achieves the above technical objects by the following technical means.
One kind remotely controlling more relay protective scheme function central pumping stations, including pumping plant, control system and monitoring system, the pump
It stands including main website and several substations, the main website is equipped with circulating cooling system and detection system, and the circulating cooling system is used
In the oil temperature of cooling main website fuel tank；Several substations in parallel, the main website are equipped with detection system in the main website, for detecting pump
It stands pressure and temperature；The control system judges whether sending alarm signal according to pump station pressure and temperature, and control pumping plant works,
The monitoring system is used to monitor in real time the state of pumping plant.
Further, the main website includes fuel tank and pressure piping, several substations in parallel between the fuel tank and pressure piping,
Installation detecting system on the pressure piping；The detection system includes pressure sensor and temperature sensor；The pressure passes
Sensor is used to detect the pressure value of pressure piping；The temperature sensor is used to detect the oil temperature of pressure piping outlet.
Further, the circulating cooling system includes the second return filter, cooler and power unit；The main website oil
Case is successively connect with power unit, cooler and the second return filter closed loop；The external heat-exchange system of cooler.
Further, the heat-exchange system includes circulating water pool, water pump and closed cooling tower；Cooling in the cooler
Water is successively connect with circulating water pool, water pump and closed cooling tower closed loop.
Further, air cooling system and spray system are installed on the closed cooling tower, are equipped with inside the closed cooling tower
Surface air cooler, described surface air cooler one end are connect with water pump, the cooling water inlet connection of the surface air cooler other end and cooler, described
Spray system is located at the top of closed cooling tower, for spraying cold water to surface air cooler surface；The closed cooling tower side be equipped with into
Style grid, the air cooling system make surface air cooler cool down by air-inlet grille.
It further, further include blower and water collection device；Blower is installed, for closing described in excluding at the top of the closed cooling tower
Hot-air inside formula cooling tower；Water collection device is installed in the blower bottom, for making vapor in hot-air become condensed water
It flows back into the closed cooling tower.
Further, the control system includes pressure judgment module and temperature judgment module；The pressure sensor will press
Force value input pressure judgment module, the pressure judgment module compared with rated pressure, judge whether to alarm according to pressure value；Institute
Temperature sensor is stated by temperature value input temp judgment module, the temperature judgment module compared with setting, is sentenced according to temperature value
It is disconnected whether to alarm.
Further, the pressure judgment module according to pressure value compared with rated pressure, it is specific as follows:
As P≤80%PN, then the pressure judgment module issues low pressure alarming；
Work as 105%PN≤ P < 110%PN, then the pressure judgment module issues early-warning for high pressure；
Work as 110%PN≤ P, then the pressure judgment module issues alarm for high voltage；
Wherein: P is the pressure value of pressure sensor detection, PNFor the rated pressure of pumping plant.
Further, the temperature judgment module according to temperature value T compared with setting, it is specific as follows:
In temperature-rise period, when T≤20 DEG C, then the pressure judgment module issues low-temperature warning；
When 20 DEG C of T≤35 DEG C <, then the pressure judgment module does not issue alarm；
When 35 DEG C of T≤56 DEG C <, then the pressure judgment module control loop cooling system work；
As 56 DEG C of 58 DEG C of < T <, then the pressure judgment module issues high temperature early warning；
As 58 DEG C≤T, then the pressure judgment module issues high temperature alarm, and stops pumping plant work；
In temperature-fall period, as 58 DEG C≤T, then the pressure judgment module issues high temperature alarm, and stops pumping plant work
Make and open circulating cooling system work；
As 56 DEG C of 58 DEG C of < T <, then the pressure judgment module releases high temperature alarm, is changed to high temperature early warning；
When 35 DEG C of T≤56 DEG C <, then the pressure judgment module releases high temperature early warning；
When 20 DEG C of T≤35 DEG C <, then the pressure judgment module closes circulating cooling system；
When T≤20 DEG C, the pressure judgment module issues low-temperature warning.
Further, the control system can be by remotely controlling pumping plant.
The beneficial effects of the present invention are:
1. of the present invention remotely control more relay protective scheme function central pumping stations, using temperature sensor and pressure sensing
Device, real-time Transmission oil sources relevant information is to control system, by logical operation, is sent on monitoring computer and shows work shape
State, staff make respective handling, realize long-range monitoring.
2. of the present invention remotely control more relay protective scheme function central pumping stations, combined using by air-cooled, water cooling
Circulating cooling system cools down for pumping plant, improves the safety coefficient of pumping plant, improves the working efficiency of central pumping station system.
3. of the present invention remotely control more relay protective scheme function central pumping stations, pumping plant can be according to hydraulic test equipment
Actual pressure demand, control a certain number of hydraulic pump start and stop to meet power demand, improve the service efficiency and section of pumping plant
Can be environmentally friendly, realize the intelligence of central pumping station.
4. of the present invention remotely control more relay protective scheme function central pumping stations, pumping plant mobile device remote is to monitoring
Computer issues order, realizes remote operation, embodies the networking of central pumping station.
Detailed description of the invention
Fig. 1 remotely controls more relay protective scheme function central pumping station structure charts to be of the present invention.
Fig. 2 is heat-exchange system structure chart of the present invention.
Fig. 3 is control system schematic diagram of the present invention.
Fig. 4 is pressure judgment module schematic diagram of the present invention.
In figure:
1- fuel tank；The substation 2- filter；The unidirectional variable pump in the substation 3-, the substation 4- main motor；The substation 5- guide type electromagnetic overflows
Flow valve；The substation 6- check valve；The substation 7- high pressure filter；8- pressure switch；9- accumulator；10- pressure sensor；11-
One overflow valve；12- temperature sensor；The first return filter of 13-；14- cooler；The second overflow valve of 15-；16- liquid level relay
Device；The second return filter of 17-；18- circulation motor；19- circulating pump；20- circulating water pool；21- water pump；22- check valve；23-
Closed cooling tower；24- spray pump；25- air-inlet grille；26- surface air cooler；27- spray system；28- blower；29- water collection device.
Specific embodiment
Present invention will be further explained with reference to the attached drawings and specific examples, but protection scope of the present invention is simultaneously
It is without being limited thereto.
As shown in Figure 1, of the present invention remotely control more relay protective scheme function central pumping stations, including pumping plant, control system
System and monitoring system, the pumping plant include main website and several substations, and the main website is equipped with circulating cooling system and detection system,
The circulating cooling system is used to cool down the oil temperature of main website fuel tank；Several substations in parallel, the main website are equipped in the main website
Detection system, for detecting pump station pressure and temperature；The control system judges whether to issue report according to pump station pressure and temperature
Alert signal, control pumping plant work, the monitoring system are used to monitor in real time the state of pumping plant.The control system major function is
Realize and monitoring computer, the data interaction between pumping plant, complete various logic operation etc., realize to the virtual protection of pumping plant and
State judgement, by controlling the start and stop of corresponding motor, to manipulate the operation of pumping plant, and opening by control overflow valve and unloading valve
Stop, to manipulate the overflow and off-load movement of oil sources.The major function of the monitoring system is to realize the long-range start and stop control of hydraulic system
Data exchange is carried out between system, working state monitoring and troubleshooting, with the control system.The major function of the pumping plant is
Sufficient hydraulic oil is provided for hydraulic test equipment, while the pumping plants information such as oil temperature, oil pressure is fed back into control system, in conjunction with prison
Control system realizes the real time monitoring to pumping plant and meets experimental facilities traffic requirement.
It is connected between the detection system and each hydraulic test equipment by networking.The hydraulic test equipment first passes through net
Network sends application flow signal to pumping plant, and pumping plant is after receiving flow signal, according to experimental facilities demand volume size and in advance
The rule of setting is calculated, and the final unlatching quantity for determining substation hydraulic pump is being met with meeting experimental facilities flow demand
Energy conservation and environmental protection, embodiment central pumping station are intelligent again while experimental facilities traffic requirement.When wherein event occurs in an experimental facilities
When barrier, remaining experimental facilities can be worked normally, non-interference.In addition, the detection system can also be with mobile device (such as hand
Machine) between communicate wirelessly, monitor computer real-time transmission data to mobile device, show that pumping plant is related on the mobile apparatus
Information, such as oil sources oil temperature, oil pressure, alarm information；Mobile device remotely can issue order to monitoring computer, pump in domination set
Relevant operation is made at station, embodies the networking of central pumping station.
As depicted in figs. 1 and 2, the main website includes fuel tank 1 and pressure piping, in parallel between the fuel tank and pressure piping
Several substations；Any substation include substation filter 2, the unidirectional variable pump 3 in substation, substation main motor 4, substation guide type electromagnetic overflow
Flow valve 5, substation check valve 6, substation high pressure filter 7.The outlet of fuel tank 1 is sequentially connected substation filter 2, son by pipeline
It stands unidirectional variable pump 3, substation check valve 6 and substation high pressure filter 7；The substation main motor 4 is for driving substation unidirectionally to become
3 work of amount pump, the import of the substation pilot operated electromagnetic relief valve 5 be located at the unidirectional variable pump in substation 3 and substation check valve 6 it
Between, the outlet of substation pilot operated electromagnetic relief valve 5 flows back into fuel tank 1 by sub- return line.The pressure piping is connection liquid
The pipeline for pressing testing equipment, P, T mouthfuls of connection hydraulic test equipments into and out of hydraulic fluid port in Fig. 1.Detection is installed on the pressure piping
System, the first overflow valve 11 and accumulator 9；The detection system include pressure sensor 10, temperature sensor 12 and pressure after
Electric appliance 8；The pressure sensor 10 is used to detect the pressure value of pressure piping；The temperature sensor 12 is for detecting pressure pipe
The oil temperature of way outlet.Pressure piping is connect by the first return filter 13 with fuel tank 1.
The circulating cooling system includes the second return filter 17, cooler 14 and circulating pump 19；The circulation motor
18 for driving circulating pump 19, the main website fuel tank 1 successively with 17 closed loop of circulating pump 19, cooler 14 and the second return filter
Connection；Second overflow valve 15 is connected in parallel between fuel tank 1 and circulating pump 19；The external heat-exchange system of the cooler 14.The heat
Exchange system includes circulating water pool 20, water pump 21 and closed cooling tower 23；Cooling water in the cooler 14 successively with circulation
Pond 20, water pump 21, check valve 21 are connected with 23 closed loop of closed cooling tower.On the closed cooling tower 23 install air cooling system and
Spray system 27 is equipped with surface air cooler 26 inside the closed cooling tower 23, and described 26 one end of surface air cooler is connect with water pump 21, described
26 other end of surface air cooler is connect with the cooling water inlet of cooler 14, and the spray system 27 is located at 23 top of closed cooling tower,
For spraying cold water to 26 surface of surface air cooler；23 side of closed cooling tower is equipped with air-inlet grille 25, and the air cooling system is logical
Crossing air-inlet grille 25 makes surface air cooler 26 cool down.Blower 28 is installed, for the enclosed will to be excluded at the top of the closed cooling tower 23
Hot-air inside cooling tower 23；Water collection device 29 is installed in 28 bottom of blower, for making vapor in hot-air become cold
Condensate flows back into the closed cooling tower 23.The surface air cooler 26 is located among closed cooling tower 23, the closed cooling tower
23 bottoms are equipped with sink, and the water that the condensed water and spray system generate can flow into sink, outside the closed cooling tower 23
Portion's installation spray pump 24 is connect with spray system, for the water in sink to be supplied to spray system.Moisturizing machine is equipped in sink
Structure.
The pumping plant working principle is that hydraulic test equipment is receiving signal to central pumping station transmitted traffic signal, pumping plant
Afterwards, a certain number of substations are opened to experimental facilities fuel feeding by logic calculation.Son when experimental facilities oil inlet, in the substation that works
Station owner's motor 4 drives the unidirectional variable pump 3 in substation to run, and hydraulic oil is sucked out from fuel tank 1, flows through substation filter 2 into substation
Unidirectional variable pump 3, substation check valve 6, substation high pressure filter 7, finally from P mouthfuls of inflow experimental facilities；When experimental facilities oil return,
Hydraulic oil is flowed out from T mouthfuls again, by the first return filter 13, finally enters fuel tank 1.When pumping plant work, temperature sensor
12 detect that oil return oil temperature is within the scope of 35 < T≤56 DEG C, and circulating cooling system automatically turns on, and circulation motor 18 rotates, and drive
Circulating pump 19 works, while water pump 21, spray pump 24, blower 28 are opened, and high temperature hydraulic oil is flowed out from fuel tank 1, by circulation
Pump 19, oil liquid enters in cooler 14, is declined by the hydraulic fluid temperature of cooler 14, and passes through the cooling water of cooler 14
A large amount of thermal energy of hydraulic oil are absorbed, cooling water heating becomes in high-temperature water injection circulating water pool 20, under the action of water pump 21, according to
It is secondary by water pump 21, check valve 22, surface air cooler 26, while spray pump 24 drives the tower water of closed cooling tower 23, is into spray
It is the high-temperature water cooling in surface air cooler 26, while blower 28 works and excludes hot-air outward in system 27, the vapor in hot-air
Under the effect of water collection device 29, condenses into condensed water and back downward into closed cooling tower 23, and under air mobilization, cold air
Enter closed cooling tower 23 by air-inlet grille 25, cool down for entire cooling tower, so the high-temperature water in surface air cooler 26 discharges heat
It can become cooling water, again flow into cooler 14, persistent loop ground is that pumping plant hydraulic oil cools.Particularly, work as enclosed
When tower water water level in cooling tower 23 is too low, operator needs timely moisturizing, avoids cooling effect impaired.
In addition, the substation pilot operated electromagnetic relief valve 5 plays overflow pressure stabilizing, system unloaded, safeguard protection；It is described
Accumulator 9 plays energy storage, system pressure maintaining, absorbs the effects of impact；The pressure sensor 10 and temperature sensor 12 monitor respectively
Oil supply pressure and returning-oil temperature, and pumping plant information is fed back to monitoring computer；First overflow valve 11 and the second overflow valve 15
Play safeguard protection, form back pressure, overflow pressure stabilizing；The substation filter 2, substation high pressure filter 7, the first oil return
Filter 13 and the second return filter 17 are used to filter oil sources impurity, run pumping plant steadily in the long term；The pressure switch 8,
Liquid level relay 16 limits the highest rated pressure and minimum rated liquid level of pumping station system respectively, when pressure switch 8 acts,
It monitors computer and issues alarm for high voltage；When liquid level is lower than minimum rated liquid level, when monitoring computer issues liquid level too low alarm；
The water collection device 29 can effectively reduce the elegant rate of tower water in closed cooling tower 23, further increase water-saving effect.
Cancel closedown relay protective scheme refers to: when system communication breaks down or system monitoring is such as high to relevant important failure
When pressure alarm, the too low alarm of oil sources liquid level, low pressure alarming, low-temperature warning, cancel closedown signal can be triggered, is passed by hardware mode
Monitoring system is passed, to make corresponding system alarm and subsequent processing, such as under auto state, system is according to having set
Logical operation carries out start-up and shut-down control to pumping plant or under manual mode, and operator continues to open according to experimental facilities demand, selection
Move or stop immediately pumping plant.
As shown in figure 3, the control system includes pressure judgment module and temperature judgment module；The pressure sensor 10
By pressure value input pressure judgment module, the pressure judgment module compared with rated pressure, judges whether to report according to pressure value
It is alert；The temperature sensor 12 is by temperature value input temp judgment module, and the temperature judgment module is according to temperature value and setting
Compare, judges whether to alarm.
As shown in figure 4, the pressure judgment module according to pressure value compared with rated pressure, it is specific as follows:
As P≤80%PN, then the pressure judgment module issues low pressure alarming；
Work as 105%PN≤ P < 110%PN, then the pressure judgment module issues early-warning for high pressure；
Work as 110%PN≤ P, then the pressure judgment module issues alarm for high voltage；
Wherein: P is the pressure value that pressure sensor 10 detects, PNFor the rated pressure of pumping plant.
When system issues alarm for high voltage, while pumping plant is automatically closed, opens the pilot operated electromagnetic relief valve of pumping plant substation, be
System unloaded decompression；When system issues early-warning for high pressure, operator is reminded to notice that pump station pressure i.e. will be excessively high, according to practical feelings
Condition can remotely close pumping plant；When system issues low pressure alarming, it is automatically stopped main oil feed pump, closes pumping plant, operator is to pumping plant
Carry out fault detection.
The temperature judgment module according to temperature value T compared with setting, it is specific as follows:
In temperature-rise period, when T≤20 DEG C, then the pressure judgment module issues low-temperature warning；
When 20 DEG C of T≤35 DEG C <, then the pressure judgment module does not issue alarm；
When 35 DEG C of T≤56 DEG C <, then the pressure judgment module control loop cooling system work；
As 56 DEG C of 58 DEG C of < T <, then the pressure judgment module issues high temperature early warning；
As 58 DEG C≤T, then the pressure judgment module issues high temperature alarm, and stops pumping plant work；
In temperature-fall period, as 58 DEG C≤T, then the pressure judgment module issues high temperature alarm, and stops pumping plant work
Make and open circulating cooling system work；
As 56 DEG C of 58 DEG C of < T <, then the pressure judgment module releases high temperature alarm, is changed to high temperature early warning；
When 35 DEG C of T≤56 DEG C <, then the pressure judgment module releases high temperature early warning；
When 20 DEG C of T≤35 DEG C <, then the pressure judgment module closes circulating cooling system；
When T≤20 DEG C, the pressure judgment module issues low-temperature warning.
In a kind of situation, the temperature of hydraulic oil can be gradually increasing with the work of system, when temperature T≤20 DEG C, system hair
Low-temperature warning out；When 20 < T≤35 DEG C, system only carries out temperature monitoring, and (as long as pumping plant works, temperature sensor continues work
Make)；When 35 < T≤56 DEG C, system can start circulating cooling system automatically, and circulating pump, water pump, spray pump work make pumping plant liquid
Pressure oil cools；When 56 < T≤58 DEG C, system issues high temperature early warning, reminds operator that should stop pumping station system；Work as T
At > 58 DEG C, system issues high temperature alarm, while controlling main oil pump and being automatically stopped operation, it is desirable that operator continue as oil sources into
Row cooling, i.e., circulating cooling system works on, until it meets temperature requirement.In another case, hydraulic fluid temperature is with following
The operation of ring cooling system can be gradually reduced, and when temperature T >=58 DEG C, system still issues high temperature alarm, circulating cooling system work；
When 56 < T≤58 DEG C, system releases high temperature alarm, issues high temperature early warning, circulating cooling system work；When 35 < T≤56 DEG C,
System releases high temperature early warning, and circulating cooling system is still cooled down；When 20 < T≤35 DEG C, it is cold that pumping plant circulation is automatically closed in system
But system only carries out temperature monitoring；When T≤20 DEG C, system issues low-temperature warning.
The embodiment is a preferred embodiment of the present invention, but present invention is not limited to the embodiments described above, not
In the case where substantive content of the invention, any conspicuous improvement that those skilled in the art can make, replacement
Or modification all belongs to the scope of protection of the present invention.
Claims (10)
1. one kind remotely controls more relay protective scheme function central pumping stations, which is characterized in that including pumping plant, control system and monitoring system
System, the pumping plant include main website and several substations, and the main website is equipped with circulating cooling system and detection system, and the circulation is cold
But system is used to cool down the oil temperature of main website fuel tank；Several substations in parallel, the main website are equipped with detection system in the main website, use
In detection pumping station operation state；The control system controls pumping plant work as needed, and the monitoring system is for monitoring in real time
The state of pumping plant.
2. according to claim 1 remotely control more relay protective scheme function central pumping stations, which is characterized in that the main website packet
Fuel tank (1) and pressure piping are included, several substations in parallel between the fuel tank and pressure piping install detection on the pressure piping
System；The detection system includes pressure sensor (10) and temperature sensor (12)；The pressure sensor (10) is for examining
The pressure value of measuring pressure pipeline；The temperature sensor (12) is used to detect the oil temperature of pressure piping outlet.
3. according to claim 1 remotely control more relay protective scheme function central pumping stations, which is characterized in that the circulation is cold
But system includes the second return filter (17), cooler (14) and power unit；The main website fuel tank successively with power unit,
Cooler (14) is connected with the second return filter (17) closed loop；The external heat-exchange system of the cooler (14).
4. according to claim 3 remotely control more relay protective scheme function central pumping stations, which is characterized in that the heat exchange
System includes circulating water pool (20), water pump (21) and closed cooling tower (23)；Cooling water in the cooler (14) successively with
Circulating water pool (20), water pump (21) are connected with closed cooling tower (23) closed loop.
5. according to claim 4 remotely control more relay protective scheme function central pumping stations, which is characterized in that the enclosed is cold
Air cooling system and spray system (27) are but installed on tower (23), are equipped with surface air cooler (26) inside the closed cooling tower (23), institute
It states surface air cooler (26) one end to connect with water pump (21), the cooling water inlet of surface air cooler (26) other end and cooler (14) connects
It connects, the spray system (27) is located at the top of closed cooling tower (23), for spraying cold water to surface air cooler (26) surface；It is described to close
Formula cooling tower (23) side is equipped with air-inlet grille (25), and the air cooling system drops surface air cooler (26) by air-inlet grille (25)
Temperature.
6. according to claim 5 remotely control more relay protective scheme function central pumping stations, which is characterized in that further include blower
(28) and water collection device (29)；Blower (28) are installed at the top of the closed cooling tower (23), for the closed cooling tower will to be excluded
(23) internal hot-air；Water collection device (29) are installed in the blower (28) bottom, for making vapor in hot-air become cold
Condensate flows back into the closed cooling tower (23).
7. according to claim 2 remotely control more relay protective scheme function central pumping stations, which is characterized in that the control system
System includes pressure judgment module and temperature judgment module；The pressure sensor (10) by pressure value input pressure judgment module,
The pressure judgment module compared with rated pressure, judges whether to alarm according to pressure value；The temperature sensor (12) will be warm
Angle value input temp judgment module, the temperature judgment module compared with setting, judge whether to alarm according to temperature value.
8. according to claim 7 remotely control more relay protective scheme function central pumping stations, which is characterized in that the pressure is sentenced
Disconnected module according to pressure value compared with rated pressure, it is specific as follows:
As P≤80%PN, then the pressure judgment module issues low pressure alarming；
Work as 105%PN≤ P < 110%PN, then the pressure judgment module issues early-warning for high pressure；
Work as 110%PN≤ P, then the pressure judgment module issues alarm for high voltage；
Wherein: P is the pressure value of pressure sensor (10) detection, PNFor the rated pressure of pumping plant.
9. according to claim 7 remotely control more relay protective scheme function central pumping stations, which is characterized in that the temperature is sentenced
Disconnected module according to temperature value T compared with setting, it is specific as follows:
In temperature-rise period, when T≤20 DEG C, then the pressure judgment module issues low-temperature warning；
When 20 DEG C of T≤35 DEG C <, then the pressure judgment module does not issue alarm；
When 35 DEG C of T≤56 DEG C <, then the pressure judgment module control loop cooling system work；
As 56 DEG C of 58 DEG C of < T <, then the pressure judgment module issues high temperature early warning；
As 58 DEG C≤T, then the pressure judgment module issues high temperature alarm, and stops pumping plant work；
In temperature-fall period, as 58 DEG C≤T, then the pressure judgment module issues high temperature alarm, and stop pumping plant work and
Open circulating cooling system work；
As 56 DEG C of 58 DEG C of < T <, then the pressure judgment module releases high temperature alarm, is changed to high temperature early warning；
When 35 DEG C of T≤56 DEG C <, then the pressure judgment module releases high temperature early warning；
When 20 DEG C of T≤35 DEG C <, then the pressure judgment module closes circulating cooling system；
When T≤20 DEG C, the pressure judgment module issues low-temperature warning.
10. according to claim 1 remotely control more relay protective scheme function central pumping stations, which is characterized in that the control
System can be by remotely controlling pumping plant.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513362A (en) * | 2019-08-30 | 2019-11-29 | 麦格思维特(上海)流体工程有限公司 | Desander automatic control system |
| CN113775601A (en) * | 2020-06-10 | 2021-12-10 | 宝武特种冶金有限公司 | Automatic pressure measurement protection method for hydraulic system of extruder |
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| CN110513362B (en) * | 2019-08-30 | 2021-02-26 | 麦格思维特(上海)流体工程有限公司 | Automatic control system of sand remover |
| CN113775601A (en) * | 2020-06-10 | 2021-12-10 | 宝武特种冶金有限公司 | Automatic pressure measurement protection method for hydraulic system of extruder |
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